Alley Insider spoke to Gracenote about the type of music users are searching for and listening to online, based on its metadata.

It found that Michael Jackson was the artist most looked up on Gracenote's database, followed by Bob Marley and Tupac Shakur.

Gracenote's metadata covers artist names, album and song titles as well as sleeve artwork and the company say it is used in "billions of searches" a month on services like iTunes, Google lyric searches and Sony products. ...